Lex de Haan said,on my timestamp of 30/05/2004 5:27 AM:
yes and no ... the ANSI/ISO SQL standard offers the three operators you need: "IS TRUE", "IS FALSE", and "IS UNKNOWN". But as far as I know, no vendor has implemented these. Note the power of these operators; they accept a Boolean argument.
Yes! Very nice. Thanks a lot, will look forward to when Oracle supports these.
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